2030 DF

					2030 DF

                                                                                                                                                                                                                                                            2030 DF
Technical Specification

Frequency Ranges
  VHF                                 Aeronautical band 117 to 136 MHz                   Environment - External
  VHF                                 Marine band 156 to 162 MHz                           Temperature                           -40 °C to +60 °C
  UHF                                 Aeronautical band 225 to 400 MHz                     Relative humidity                     100%
                                                                                           Wind speed up to                      200 km/hr
                                                                                           Icing/snow                            4 cm ice or 4 cm wet snow
Antenna - Wide Aperture
 VHF                                  Eighteen element dipole array                      Environment - Internal
 UHF                                  Eighteen element dipole array                        Temperature                           0 °C to +55 °C
 or                                   Eighteen element unipole counterpoise array          Relative humidity                     95%

Antenna - Medium Aperture                                                                DF System                               Doppler principle
 VHF                                  Nine element dipole array
 UHF                                  Nine element dipole array
                                                                                         DF Channels                             Min 1 - Max systems dependent

Antenna Physical - Wide Aperture
 VHF                                  3.66 m diam, 5.5 m above ground                    Independent Operators                   Min 1 - Max systems dependent
 UHF Dipole                           1.67 m diam, 3.7 m above ground
 UHF Unipole                          7.6 m diam, 3.7 m high counterpoise
                                                                                         Operation Modes                         Local and remote mode

Antenna Physical - Medium Aperture
 VHF                                  2.13 m diam, 5.5 m above ground                    System Interfaces                       RS232, RS485, modem, Ethernet
 UHF                                  0.8 m diam, 3.7 m above ground

                                                                                         Interface Protocol                      Asynchronous
 Channel Spacing                      25 kHz or12.5 kHz or 8.33 kHz
 Type                                 Fernau 2035 (other standard communications         Message Format                          ASCII, Hex
                                      receivers can be accommodated)                     Baud Rates                              Selectable
                                      Single channel or multi-channel

                                                                                         Power Supply
Modulation                            CW, AM and FM                                        AC                                    115/230 VAC + 10%
                                      The DF requires AM demodulation from all                                                   (approx. 200 VA per operator channel)
                                      types of received signal. As an option, an FM        DC                                    Option
                                      demodulator board may be added to extract                                                  22 to 30 VDC battery backup
                                      speech for FM signals (marine applications)

Vertical Response                     Better than 60 elevation degrees at the low         Antenna Site                           LUI/HMI displaying all active DF channels to
                                      end of the frequency band                                                                  0.1 degree
                                                                                           Operator Site                         Digital/Vector indicator
                                                                                                                                 0.5 degree numerical resolution
Signal Polarisation                   Vertical                                                                                   5 degree vector resolution
                                                                                                                                 Persistence 2 - 8 seconds
                                                                                                                                 Presentation any 2 of QTE, QDM, QDR, QUJ
Polarisation Error                    <1 VHF, <0.5 UHF for equal vertical and                                                    Last bearing recall (store)
                                      horizontal fields                                                                          Freeze channel (option)
                                                                                                                                 Local transmitter inhibit (option)

Bearing Accuracy                                                                         Frequency Control
  Wide Aperture                       Site improvement factor 6.0 to 10.0 relative to      Antenna Site                          LUI/HMI                                                                   Fernau Avionics’ 2030 Direction Finder offers reliability, flexibility and superior performance backed by thirty years of worldwide
                                      narrow aperture system                               Display Site                          Touch screen NVD                                                          installation experience.
  Medium Aperture                     Site improvement factor 2.5 to 4.0 relative to
                                      narrow aperture system

                                                                                         Status Information
                                                                                                                                                                                                           State of the Art                               Applications                                 Reliability
Instrument Error                      0.1 degree                                           BITE                                  Built In Test Equipment
                                                                                           Antenna                               Dipole failure identification
                                                                                           Resolver System                       Individual module status                                                  The high resolution 2030 DF provides ac-       The Doppler method for bearing               Fernau has paid particular attention during
Bearing Response                                                                           Display Equipment                     Individual module status                                                  curate navigation information using standard   resolution used by the 2030 DF is a cost     the development of the 2030 DF to equip-
  Initial Bearing                     Within 400 ms                                        Inter Site                            Communications status
                                                                                           History                               Systems fault log                                                         VHF or UHF radio systems. The techni-          effective method of traffic control and      ment reliability and maintenance. By using
  Subsequent Bearing                  Within 120 ms for 1 integration cycle                                                                                                                                cal advantages of the 2030 system include      an enhancement to radar installations.       the latest technology and more dependable
                                      n x 120 ms for n integration cycles                System Testing                          Automatic/manual test transmission at
                                      (n can be set from 1 to 16)                                                                selected frequency.                                                       extensive BITE facilities, remote control      The system is used by air traffic control    components, new standards in reliability
                                                                                                                                 Remote calibration on each DF channel                                     operation, remote indication of fault param-   authorities; port and harbour authorities;   have been set, including an MTBF in excess
Sensitivity                           A bearing with 2 degree rms fluctuation due to     Test Oscillator                         Optional                                                                  eters, remote testing and fault diagnosis.     coastguards and the Royal Navy.              of 11,000 hours.
                                      noise is obtainable with a signal field strength   Frequency Range                         117 MHz - 400 MHz
                                      of 5 uV/m                                                                                  Supplied with antenna
                                                                                                                                                                                                           The system has a modular, versatile design
                                                                                                                                                                                                           which can easily expand as requirements

                                                                                                                  The Company reserves the right to change specifications without notice @ February 2008                                                                       2030 DF

                               Fernau Avionics Limited Airport Executive Park President Way Luton Bedfordshire United Kingdom LU2 9NY
                               Telephone +44 1582 483111 Facsimile +44 1582 484404 Email Information@ fernau.com www.fernau.com

The Auto-Triangulation System
determines position fixes (Latitude and
Longitude) and Range from the bearings
of RF transmissions detected by 2030
DF stations located throughout the
Customer’s region. Fixes are presented
to the Operator on a graphical display
and provide a backup facility to the main
radar display. Bearings are processed
in real time in order to calculate the
position of the RF source. Fixes displayed
on an Auto-Triangulation Workstation
are overlaid on a map of the region.
The Operator can scroll or zoom the
map display or auto-follow known
transmissions. Operators can measure
distances on the map, search a database of
known map features or interrogate each
feature for data such as map co-ordinates
or emergency telephone numbers.
Operators select which stations are to
receive bearing data and which frequencies
are monitored. The Auto-Triangulation
System may also operate in replay mode,
whereby bearing data previously logged to
file can be replayed and fixes calculated, as
if live data were being used.

                                                Touchscreen NVD

                                                The touch screen Numeric Vector Display
                                                provides a direct, quick and convenient
                                                method of controlling and configuring the
                                                2030 DF from an Operator position.

                                                                        continued overleaf....
Touchscreen NVD (continued)

The Touchscreen NVD has 2 modes of
operation, TC Mode and Engineering
Mode. In TC mode, the Operator will be
able to see the source of the transmission
unless it is either the Calibrator or Test
Oscillator. If the Operator enabled the
Test Oscillator, the bearing and vector
appears on his display.

                                                                                            In Engineering mode, the Operator will
                                                                                            be able to see all bearings irrespective of
                                                                                            the source of the transmission. Either
                                                                                            MAGNETIC (QDR/QDM) or TRUE
                                                                                            (QTE/QUJ) is selected using the ‘TRUE
                                                                                            BEARINGS’ parameter displayed on the
                                                                                            Frequency Configuration Screen and the
                                                                                            Primary Display Screen indicates either
                                                                                            MAGNETIC or TRUE in each corner
                                                                                            depending upon which selection is
                                                                                            currently operational.

The touch screen Numeric Vector Display
provides a direct, quick and convenient
method of controlling and configuring the
2030 DF from an Operator position.

                       Fernau Avionics Limited, Airport Executive Park, President Way, Luton, Bedfordshire LU2 9NY, UK
                 Tel: +44 (0) 1582 483111 Fax: +44 (0) 1582 484404 E-mail: sales@fernau.com Web-site: www.fernau.com
System Overview                                  This allows an entire national infrastructure                                                                                                                                    Where site conditions allow, the coun-
                                                 to be monitored from one point.                                                                                                                                                  terpoise can be discarded. This makes it
The 2030 DF system is capable of receiving
                                                 Autotriangulation workstations and                                                                                                                                               possible to mount the medium aperture VHF
signals in the VHF and UHF frequency
                                                 touchscreen vector displays can be slaved                                                                                                                                        system on a common mast above a wide
ranges and determining bearings to a
                                                 of both RMM and CRMM systems using a                                                                                                                                             aperture UHF antenna and offset the UHF
resolution of 0.1 degrees. A typical system
                                                 LAN configuration.                                                                                                                                                               auxiliary antenna, reducing overall capital
comprises an antenna, receiving and
                                                                                                                                                                                                                                  costs without compromising performance.
resolving equipment, touch screen numerical      System Maintenance
vector display and frequency control
                                                 All modules are plug-in and accessed from                                                                                                                                        Air Traffic Control
equipment, front-end processor and a
                                                 the front of the 2030 DF cabinet. The BITE
signal distribution facility option.                                                                                                                                                                                              The Fernau 2030 DF provides an accurate
                                                 system continually monitors the DF and
                                                                                                                                                                                                                                  bearing of any aircraft transmitting on
The basic resolving equipment includes a         gives alarm indication in the event of a
                                                                                                                                                                                                                                  monitored frequencies within the VHF or
combined RF resolver rack with a capacity        module failure or change in the state of
                                                                                                                                                                                                                                  UHF airbands and permits tracking of flight
for eight channels, with one resolver module     system performance. By using the RMM
                                                                                                                                           Autotriangulation - UK Air Traffic Control Centre
                                                                                                                                                                                                                                  progress, landing approach and ground
per channel as required. Expansion beyond        system for fault indication, a typical repair
                                                                                                                                                                                                                                  traffic movement. At many smaller airfields
the eight channel system simply requires the     would take less than fifteen minutes. All
                                                                                                     Additional workstations can be added to                                    The Fernau nine-element medium aperture           a DF system may be the only navigation
addition of racks. The receiving and resolving   LRUs are keyed to prevent a module being
                                                                                                     the LAN network as required. The cental                                    DF system has most of the electrical              aid available. It does not require any form
equipment, which is configured for               inserted in an incorrect position.
                                                                                                     CRMM passes all bearing and status                                         characteristics of the wide aperture system.      of transponder or other device fitted to
installation into a 19” rack mounting,
                                                                                                     information to each workstation, allowing                                  It is used in applications where the site         the aircraft apart from the standard radio
is co-located with the aerial. All information
                                                                                                     the auto T system to monitor the health of                                 improvement factor is not as critical or          transceiver. At larger airports the 2030 DF
is processed at the aerial site before
                                                                                                     the entire national network and optimise the                               where a simpler and smaller lightweight           provides supplementary information in the
transmission in digital format to the display
                                                                                                     auto triangulation proccess.                                               antenna would be an advantage.                    form of target identification on radar displays
site. At the display site, information is
                                                                                                                                                                                                                                  and is used as a backup system in case of
processed by the front-end processor and
                                                                                                     Antenna System                                                             Combined VHF/UHF Antenna Systems                  radar failure. It is also used as a primary aid in
passed to the display equipment. The
                                                                                                     The Fernau eighteen-element wide aperture                                  Various options exist for a combined VHF          the event of diversion operations.
number of operators is unlimited, due                                                                                                                                                                                                                                                                            Coastguard Station
to the Ethernet bus structure.                                                                       DF system is highly accurate and more cost                                 and UHF Direction Finding system. The
                                                   Eighteen Element VHF 2030 DF in The Netherlands
Additional operators can be accommodated                                                             effective than an antenna with a large number                              most comprehensive of these configurations
                                                 Position Fixing Systems (Autotriangulation)                                                                                                                                                                                           Naval Operations
by connecting a numerical vector                                                                     of elements. It minimises site errors caused                               is the UHF unipole counterpoise system
                                                 The Fernau DF plays a vital role in air and         by reflections from surrounding objects                                    with a VHF wide aperture antenna mounted                                                               For shipborne use, Fernau has a DF system
display/control unit to the LAN. Test trans-
                                                 sea emergency search and rescue operations          and employs a unique phase comparison                                      coaxially. The UHF counterpoise system                                                                 which can be installed on aircraft carriers,
missions can be applied to a selected chan-
                                                 when used with FAL autotriangulation                technique which helps cancel errors due to                                 comprises an array of eighteen unipole ele-                                                            helicopter support ships and small ocean
nel. This facility can be locally activated at
                                                 networks. With fast response times to               frequency drift, aircraft or vessel movement,                              ments mounted on a ground plane to sample                                                              transport vessels. The 2030 DF gives reliable
the aerial site or remotely activated via the
                                                 distress calls, assistance can be quickly           or rotor blade modulation. The system is                                   the incoming signal at eighteen equally spaced                                                         and proven performance for naval
communication link.
                                                 and accurately directed to the scene. The           based on an electronically scanned ring of                                 points. The counterpoise comprises a 7.6                                                               operations around the world.
                                                 autotriangulation system links DF stations          dipoles producing a Doppler modulated                                      m diameter framework covered by wire                         Eighteen Element VHF System
Remote Maintenance and Monitoring (RMM)
                                                 and uses conventional telephone lines to            output which is combined with that of a                                    mesh, typically 3.7 m above the ground. The
                                                 provide bearings and position. Exact location,      reference antenna. This signal is fed to a                                 purpose of the counterpoise is to provide         Marine Traffic Management
The 2030 DF has a powerful, integrated
monitoring and maintenance system                including latitude, longitude, frequency, signal    standard communications receiver and the                                   a pseudo earth screen directly below the          The Fernau 2030 DF is used by the
displayed locally on a PC or remotely on a       level and time, is displayed on the screen.         resulting audio is processed by a hybrid                                   unipoles. This prevents any distortion of         Coastguard throughout the UK, where it
PC. The RMM system has a number of dis-          The operator can provide instant bearing            analogue/digital computer. Frequency shift                                 the polar field of the main antenna array         plays a vital role in the management of vessel
play screens for operator parameters, overall    and distance information between any two            techniques isolate the directional information                             due to the mechanisms below it (e.g., metal       traffic and marine safety. Radio direction
system status, system configuration, LRU         or more points on the map, and recall past          from interfering frequency modulated signals                               objects, power cables, buildings). It also acts   finding is essential in areas of high shipping
diagnostics and self check routines.             events. The new generation of auto                  and ensure that bearings are not affected by                               as a shield to ground reflected signals. The      density where small vessels can be lost
                                                 triangulation systems have been designed            transmitter frequency drift. This design also                              standard VHF antenna is mounted above the         on a cluttered radar display. It is often the
The local regional RMM for each DF site          for distress frequency and multi channel use,       permits the use of standard communications                                 centre of the array.                              only means of locating vessels in distress,
                                                                                                                                                                                                                                                                                                          HMS Ocean
can be linked into a Central Dual Redundant      each workstation is configured for LAN              receivers using AM modulation, although                                                                                      especially when they have little or no radar
RMM (CRMM).                                      operation and capable of monitoring any             CW, AM and FM signals may be resolved for                                                                                    reflection capability because of size, hull
                                                 channel operational on the network.                 DF processing.                                                                                                               construction or sea conditions.
    2030 DF                                                                                                                                                                                                                                                                                                                  2030 DF